Jump to content
Sign in to follow this  
Nicklamp

sm 70 -j-RA22 analog input

Recommended Posts

Hi i try to connect this transmiter https://store.clarksonlab.com/HI8936C.aspx . 

it has the following terminal. 1. 20+ vdc 2. com 3. com 4. 4-20ma.  

1and 2 is the power supply and 4-20 should go in the analog input. plc and transmiter have the same power supply.

i get no signal. I can measure 4-20 ma between +20 vdc and 4-20 ma at the transmiter.

samba has 37 Ω resistance analog input and this transmiter is max 500 Ω output should i use a 500 Ω  resistance connected in series? 

thank you in advace!

 

 

Share this post


Link to post
Share on other sites

Unitronics Analog Inputs are sinking and use 0V as common.

Sensor you refer require external power, so it is sinking as well.

To connect to Unitronics Analog Inputs, you have to use special adapter/transmitter/current loop repeater.

May be Forum Members used such devices in projects.

B.R.

 

Share this post


Link to post
Share on other sites

Ahh, one of the Hanna products.  I used to sell them and got bit by the same problem you're having.  Double sinking signals.

You'll need a loop isolator to interface this product.

Joe T.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...